子空间约束的一阶秩1干扰下的自适应检测  

Adaptive Detection with Subspace Constrained Rank one Interference of the First Order

作　　者：邹鲲[1] 来磊 骆艳卜[1] 李伟[1] ZOU Kun;LAI Lei;LUO Yanbo;LI Wei(School of Information and Navigation,Air Force Engineering University,Xi’an 710077,China)

机构地区：[1]空军工程大学信息与导航学院,西安710077

出　　处：《电子与信息学报》2021年第6期1659-1666,共8页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61571456,61603409,61871396);博士后基金(2017M623352,2018T111148);陕西省自然科学基金(2020JM-343,2020JM352)。

摘　　要：在复杂电磁环境中,雷达获取的回波数据若受到干扰,会影响到雷达的探测性能。该文针对雷达目标自适应检测问题,假定待检测单元和部分参考数据受到1阶秩1干扰,且干扰约束在某个已知的子空间内。首先基于双步广义似然比(2SGRLT)准则,提出子空间约束(SC)的2SGLRT检测器(SC-2SGLRT)。进一步采用修正的双步广义似然比(M2SGLRT)准则,提出子空间约束的M2SGLRT检测器(SC-M2SGLRT),该检测器的性能明显优于SC-2SGLRT。最后基于3步(3S)广义似然比检验准则,提出子空间约束的3步广义似然比检测器(SC-3SGLRT),该检测器性能与SC-2SGLRT相当,且计算量最小。计算机仿真分析表明,充分利用参考数据和干扰先验信息,有助于提升检测性能。In the complex electromagnetic environment,the radar returns may contain some interference components,which leads to the detection performance degradation.In this paper,considering the adaptive detection problem,where the cell under test and a portion of the reference data are contaminated by the rank one interference of the firs order,constrained in a known subspace.Base on the 2-Step Generalized Likelihood Ratio Test(2SGLRT)criterion,a Subspace Constrained(SC)2SGLRT(SC-2SGLRT)detector is proposed.Furthermore,using a Modified 2SGLRT(M2SGLRT),a SC-M2SGLRT detector is proposed,which has a better detection performance than 2SGLRT.Finally,using the so called 3SGLRT criterion,a SC-3SGLRT detector is proposed,whose detection performance is similar to the 2SGLRT,but with very small computation load.The computer simulation results show that,to make full use of all reference data and a prior information of the interference is helpful to improve the detection performance.

关 键 词：自适应检测 1阶秩1干扰 子空间约束干扰 广义似然比检测 检验准则 

分 类 号：TN957.51[电子电信—信号与信息处理]